G40.5

Non-billable

Epileptic seizures related to external causes

G40.5 is the ICD-10-CM code for Epileptic seizures related to external causes. It is a non-billable category code — use a more specific child code such as G40.50 for billing.

Status
Header (non-billable)
Chapter
G00-G99
Parent
G40
Subcodes
1
Edition
FY2026

G00-G99 Diseases of the nervous system

Includes

  • Epileptic seizures related to alcohol
  • Epileptic seizures related to drugs
  • Epileptic seizures related to hormonal changes
  • Epileptic seizures related to sleep deprivation
  • Epileptic seizures related to stress

Use additional code

  • code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Notes

  • , if applicable, associated epilepsy and recurrent seizures (G40.-)

Frequently asked questions

What is ICD-10 code G40.5?
G40.5 is the ICD-10-CM code for "Epileptic seizures related to external causes". It falls under G00-G99 Diseases of the nervous system.
Is G40.5 a billable code?
No — G40.5 is a non-billable header code. Use a more specific child code (such as G40.50) for billing.
What are the subcodes of G40.5?
G40.5 has 1 more specific child code, including G40.50.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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